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  • In this paper it is demonstrated that system peaks are inducted by multivalent weak ionic species in background electrolytes. Their existence is derived from SystCharts and from peak shape diagrams and the theory is confirmed experimentally. If analytes are present in a sample, with mobilities approximately equal to the mobility of a system peak, they interact, resulting in a strong increase of electromigration dispersion. This leads to a strong peak broadening, peak deformation and a loss of resolution. Typical background electrolytes containing multivalent ionic species, e.g. phosphate and phthalate buffers, in literature ofte proposed to be robust electrolytes, are therefore not always universally applicable and can fail for the application of specific analytes. This paper brings a systematic study of the above phenomena and shows theoretical and experimental results for BGEs containing phosphoric acid and phthalic acid.
  • In this paper it is demonstrated that system peaks are inducted by multivalent weak ionic species in background electrolytes. Their existence is derived from SystCharts and from peak shape diagrams and the theory is confirmed experimentally. If analytes are present in a sample, with mobilities approximately equal to the mobility of a system peak, they interact, resulting in a strong increase of electromigration dispersion. This leads to a strong peak broadening, peak deformation and a loss of resolution. Typical background electrolytes containing multivalent ionic species, e.g. phosphate and phthalate buffers, in literature ofte proposed to be robust electrolytes, are therefore not always universally applicable and can fail for the application of specific analytes. This paper brings a systematic study of the above phenomena and shows theoretical and experimental results for BGEs containing phosphoric acid and phthalic acid. (en)
Title
  • Why robust background electrolytes containing multivalent ionic species can fail in capillary zone electrophoresis.
  • Why robust background electrolytes containing multivalent ionic species can fail in capillary zone electrophoresis. (en)
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  • Why robust background electrolytes containing multivalent ionic species can fail in capillary zone electrophoresis.
  • Why robust background electrolytes containing multivalent ionic species can fail in capillary zone electrophoresis. (en)
skos:notation
  • RIV/68081715:_____/01:25010008!RIV/2003/AV0/A25003/N
http://linked.open.../vavai/riv/strany
  • 41;49
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA203/01/0401), P(GA203/99/0044), P(IAA4031103), P(IAA4031703), Z(AV0Z4031919)
http://linked.open...iv/cisloPeriodika
  • 1
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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http://linked.open...dnocenehoVysledku
  • 702249
http://linked.open...ai/riv/idVysledku
  • RIV/68081715:_____/01:25010008
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • capillary zone electrophoresis; system peaks; organic acids (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [BECCE3FBA328]
http://linked.open...i/riv/nazevZdroje
  • Journal of Chromatography A
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
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http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 916
http://linked.open...iv/tvurceVysledku
  • Boček, Petr
  • Gebauer, Petr
  • Beckers, J. L.
http://linked.open...n/vavai/riv/zamer
issn
  • 0021-9673
number of pages
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